摘要/Abstract
室温条件下，氰基亚胺与香豆灵酸甲酯或吡喃酮的[3＋2]环加成反应可高效地进行，以较高至优秀的产率和优秀的非对映选择性生成二氢吡喃并吡唑酮衍生物.
关键词: 环加成, 氰基亚胺, 香豆灵酸酯, 吡喃酮, 吡唑啉
The 1,3-dipolar cycloaddition of nitrilimines with methyl coumalate or pyranone worked efficiently in the presence of iPr2NEt under room temperature to give functionalized dihydropyrano[3,2-c]pyrazol-5(1H)-one derivatives in high to excellent yields with excellent diastereoselectivities.
Key words: cycloaddition, nitrilimine, coumalate, pyranone, pyrazoline
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